Definition of an LCD Projector
An LCD projector is a device that uses a liquid crystal display technology to project still images, video and other data onto a screen or other surface.
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Technology
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Most LCD projectors use a metal halide lamp or similar lamp to generate light, which passes polarized light through three LCD panels. These panels selectively allow pixels of red, green or blue light pass through to another prism that combines the colors and projects them onto a remote surface.
Advantages
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LCD projectors compete with another projection technology known as “digital light processing,” which Texas Instruments invented. LCD projectors generally have better color saturation and are more energy efficient.
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Disadvantages
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Compared to digital light processing, LCD technology is often thought to have poor black levels, poor contrast and pixilation when viewing motion graphics. However, many recent LCD projectors have succeeded in minimizing these flaws.
Brands
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Several companies, including Sony, Epson, NEC, InFocus, Panasonic, Samsung, Sanyo, Toshiba, ViewSonic, Hitachi and 3M, manufacture LCD projectors. Some models are ultraportable and designed to sit on flat surfaces. Other models are made to mount on ceilings.
Prices
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Prices of LCD projectors range dramatically based on brand, quality, technology type and application. As of 2010, online retailers sold older or low-end models starting at around $350 dollars, while other models cost well over $5,000.
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